Fairchild A/V mod chip FMS6406

[strattsp]

Anyone played with this? I ordered some, I'd like to see if it makes the A/V mods easier.

 

FMS6406

[A.J. Franzman]

The main benefit I see is that it gives simultaneous independent Y/C (S-video) and composite outputs from Y/C inputs. It might also be useful to improve the quality of the 2600's RF output (possibly even allowing all three output forms simultaneously), BUT the chip's notch output is designed to drive a 600 ohm impedance load and I believe the 2600's RF modulator presents a much lower impedance than that. Perhaps an impedance-matching transformer could help, but then you might end up re-introducing the very distortions this chip is designed to filter out, or worse.

Edited April 19, 2007 by A.J. Franzman

[strattsp]

That was exactly what caught my eye. I just got some in the mail, but they are surface mount. I am waiting on some surfboard pads so that I can actually work with them. I'll let y'all know how it works.

[bones]

Strattsp, that is one seriously demented avatar...I love it!

[strattsp]

Alright, so I've given it my best try, and I've got nothing. I am working on a colecovision, as I am more comfortable with that mod, and I have separate Luma & Chroma both going in, but nothing coming out. The voltage on the signals actually dropped coming out of the chip. I had two basic EE classes 10 years ago, so really I just know enough to be dangerous, but not to really do a whole lot on my own.

 

I would really like to get this chip working for both the Colecovision and the 2600, Any suggestions?

[strattsp]

So I have a few of these chips laying around, I have some surf boards coming in the mail, I figured it would be a snap to use this chip so I bought some extras.

 

If anyone thinks they could implement this chip in a 2600, 5200, or colecovision, let me know, and I will send you a chip and a surfboard free of charge (as long as you share your results). I think it would be really cool to have an easy way to output composite, s-video, and RF simultaneously.

 

Let me know,

Steve

[ten-four]

Hi Strattsp...

 

I'll like to try the FMS6406.

 

But in the PDF is nothing about PAL vs. NTSC.

 

If it is a RF power-up signal, i'm not sure on PAL, but with an RGB-signal i'll try it.

 

The test will be on a PAL. CBS-ColecoVision.

 

Have you tested the National LM1881 Video Sync Separator ?

[strattsp]

I have not tried the LM1881. The FMS6406 info sheet says it is compatible with PAL. PM me your address and I'll send you a chip and a board. Hopefully it won't cost too much to send it overseas, if it does, I'll let you know.